Chalk Test Watertight Doors

A chalk test is a way of verifying that the gasket in a watertight door is evenly contacting the frame which ensures a watertight seal.

Chalk test watertight doors.

Chalk is applied evenly around the knife edge coaming compression bars or panel cross seams of doorways. The chalk must have continuously around the watertight sealing it has water tightness. Shipboard machinery equipment and systems requirements for. Very important to ensure the door perfo.

Chalk testing is one of the key elements in quality testing at the manufacturing plant. 2 a every watertight door of the sliding type shall be capable of being operated by efficient hand operated gear both at the door itself and from an accessible position above the bulkhead deck. How to perform a chalk test on an individually dogged watertight door and how to adjust a dog should it fail the test. Code of federal regulations cfr standards.

B the operating gear for operating from above the bulkhead deck any sliding watertight door fitted in the bulkhead of a machinery space shall be. Chalk testing chalk powder is applied to the coaming compression bars and panel cross seams the hatches are then closed and re opened. Rules for building and classing steel vessels. Chalk and hose tests for seals are time consuming and sometimes completely impractical.

Chalk testing is used for visual inspection of the compression integrity of doors and hatches on vessels that hold the potential for flooding. Title 46 title 46 part 163 001 doors watertight sliding and door controls for merchant vessels through the 1991 edition abs standard. The spray from a nozzle of 12 mm diameter is sprayed from a distance of 1 to 1 5 m with a water jet pressure of 0 5 ms 1. Mil dtl 901 shock test h i.

A test to verify the tightness of a joint by a jet of water with. Very important to ensure the door ope. How to perform a chalk test on a wheel operated watertight door and how to adjust door dogs should it fail the test. Testing procedures of watertight compartments.

Specific test requirements are given in 4 4 and table 1. If there are irregularities in the chalk markings then it is assumed that these areas are not weather tight. The hose test is used in conjunction to determine the weather tightness of doors and hatch covers. Close the door tightly then open check the watertight door sealing.

The international association of classification societies states that a chalk test must be followed by a hose test.